Estimation method of doa and dod for mimo radar based on coprime array

A DOA and array technology, applied in the field of communications, can solve the problem of a small number of identifiable sources, and achieve the effect of high target reconnaissance accuracy and a large number of sources

Active Publication Date: 2017-07-04
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The present invention proposes a method of using a coprime array as a signal transceiver array to estimate DOA and DOD values, which improves the accuracy of target reconnaissance and the number of identifiable information sources, so as to solve the problem of the number of identifiable information sources in MIMO radar systems in the prior art. less problem

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  • Estimation method of doa and dod for mimo radar based on coprime array
  • Estimation method of doa and dod for mimo radar based on coprime array
  • Estimation method of doa and dod for mimo radar based on coprime array

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] Refer to attached figure 1 , the concrete steps of the present invention are as follows.

[0048] Step 1, establish a coprime array model.

[0049] Use 2P+Q-1 antenna receivers to form a coprime array, where P and Q represent two coprime numbers, and their value range is Q>P≥2.

[0050] Treat each antenna receiver as an array element.

[0051] An electromagnetic signal is incident on a coprime array.

[0052] The specific steps of the method of constructing a coprime array model are as follows:

[0053] The construction coprime array model reference in the embodiment of the present invention figure 2 , use Q antenna receivers to form a linear array 1 with uniform array element spacing, use 2P-1 antenna receivers to form a linear array 2 with uniform array element spacing, the array element spacing of linear array 1 is Pd, and the array element sp...

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Abstract

The invention discloses a method for estimating the DOA and DOD of an MIMO radar based on a co-prime array, and mainly solves problems in the prior art that an MIMO radar system is low in accuracy of target detection and is small in number of recognizable information sources. The method comprises the following steps: (1) building a co-prime array model; (2) obtaining array receiving data; (3) calculating an array receiving vector; (4) estimating a covariance matrix; (5) drawing an MUSIC power spectrum chart, and estimating DOA and DOD values. The method provided by the invention remarkably improves the accuracy of target detection and increases the number of recognizable information sources. The method can be used for the detection of passive positioning of an airplane, a ship or other moving objects through a radar.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) radar system based on a coprime array in the field of radar technology, and the direction of arrival (Direction of Arrival, DOA) and target launch Angle (Direction of Departure, DOD) joint estimation method. The invention realizes target reconnaissance and passive positioning of aircraft and ship moving targets through radar. Background technique [0002] The estimation of signal DOA and DOD is an important branch in the field of array signal processing. It refers to the use of antenna arrays to inductively receive spatial acoustic signals and electromagnetic signals, and then use modern signal processing methods to quickly and accurately estimate the direction of the signal source. It has important application value in radar, sonar, wireless communication and other fields. With the continuous a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 蔡晶晶鲍丹武斌刘高高秦国栋李鹏苏瑶
Owner XIDIAN UNIV
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